How to restore lost permissions for the IIS built-in Network Service account

How to restore lost permissions for the IIS built-in Network Service account

  

Symptoms:

Service unavailable error while trying to access Service Center.

The Event Viewer logs shows the following error:

    The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID {A9E69610-B80D-11D0-B9B9-00A0C922E750} to the user NT AUTHORITY\NETWORK SERVICE SID (S-1-5-20). This security permission can be modified using the Component Services administrative tool.
Cause:

The built-in IIS NETWORK SERVICE account has lost permissions.

Resolution:

Take the following steps so as to restore the entitled Launch and Activation Permissions.
  1. Open Component Services (Start-->Administrative Tools-->Component Services).
  2. Expand Component Services, Computers, My Computer, DCOM Config.
  3. Scroll down and find the application (IIS Admin).
  4. Issue Right-Click-->Properties and select the Security tab. In the "Launch and Activation Permissions" option, ensure that the Customize radio button is selected, and click Edit.<br /> After that add the entitled account, giving it Launch and Activate Permission.
  5. Restart IIS and continue on.

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Best Regards

Carlos Cabral